bought phone person didnt turn off find my iphone so now im screwed

There is nothing we can do for you.

Activation Lock Problem

It requires the Apple ID and password of the previous owner. If you don't have it and cannot get it, then the device is useless to you. Return it for a refund, if you can, or take it to an Apple store for an exchange provided they will help you.

Find My iPhone Activation Lock

If you can't activate your iPhone - Apple Support

In the future check first before buying second hand: How to check for Activation Lock before buying a used iPhone.

There's no way to bypass Activation Lock if the seller did not deactivate Find My iPhone.

Maybe it was stolen? Get your money back if possible otherwise you've a brick.